一种新的面向卫星网络的链路层S-MAC协议  

A SATELLITE NETWORKS-ORIENTED NOVEL LINK LAYER S-MAC PROTOCOL

作　　者：成诚[1] 孙力娟[1] 叶晓国[1] 肖甫[1] 郭剑[1] 

机构地区：[1]南京邮电大学计算机学院,江苏南京210003

出　　处：《计算机应用与软件》2009年第12期16-17,47,共3页Computer Applications and Software

基　　金：国家自然科学基金(60573141;60773041);国家高技术研究发展计划(2006AA0IZ219);江苏省自然科学基金(BK2005146);江苏高技术研究计划(BG2005038;BG2006001)

摘　　要：媒体接入控制协议是卫星网络的一个重要协议。为提高卫星通信网络的信道利用率,提出一种将固定时隙分配和按需请求分配相结合的混合式S-MAC协议。仿真结果表明:S-MAC协议在吞吐量性能上明显优于现有的纯固定分配,在仿真的后期逐渐超过纯按需分配的吞吐量,S-MAC协议在提高信道利用率的同时,保持了较高的吞吐性能和传输时延性能。Media Access Control protocol is an important protocol in satellite networks. To improve the bandwidth utilization of the satellite networks,a hybrid S-MAC protocol which combines Fix Assignment Multiple Access with Demand Assignment Multiple Access is proposed. Simulation results show that S-MAC protocol improves throughput performance greatly comparing with the existing pure Fix Assignment Multiple Access, and gradually exceeds pure Demand Assignment Multiple Access in the final phase of the simulation, S-MAC protocol improves the bandwidth utilization, and achieves higher throughput performance as well as with short transmission delay.

关 键 词：卫星网络 媒体接入控制 S-MAC协议 

分 类 号：TN915.04[电子电信—通信与信息系统] TN927.2[电子电信—信息与通信工程]